D 340i CO: Tulean, Nevada
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Agnostida
- Metagnostidae
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Geragnostus sp.
Howell 1935
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Trilobita
- Asaphida
- Asaphidae
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Megistaspis floweri
Ross 1970
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| Ekaraspis | ||||||||||
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Aulacoparia cf. venta
(Hintze 1953)
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Presbynileus sp.
Hintze 1954
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Eureka |
| Coordinates: | 39.2° North, 116.3° West (view map) | ||||
| Paleocoordinates: | 4.7° South, 84.3° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Early/Lower Ordovician |
| 10 m.y. bin: | Ordovician 1-2 | ||
| Key time interval: | Tulean | Trilobite zone: | Protopliomerella contracta |
| Age range of interval: | 480.30000 - 473.90000 m.y. ago |
Stratigraphy
| Formation: | Ninemile | ||||
| Regional section: | Antelope Valley Composite | Regional bed: | 1542 ft | ||
| Regional order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Ibexian; G2? | |||||
Lithology and environment
| Primary lithology: | lithified "shale" | ||
| Lithology description: silty; calcareous; interbedded w/ledgy Ls | |||
| Environment: | deep subtidal shelf | Tectonic setting: | passive margin |
| Geology comments: middle shelf | |||
Taphonomy
| Modes of preservation: | body,replaced with silica |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collectors: | J. Ross, Jr. |
Metadata
| Also known as: | SF 611 | ||
| Database number: | 104545 | ||
| Authorizer: | S. Finnegan | Enterer: | S. Finnegan |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2011-02-07 12:04:21 | Last modified: | 2012-08-31 16:26:39 |
| Access level: | the public | Released: | 2011-02-07 12:04:21 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 25411. | R. J., J.r. Ross. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639:1-99 [S. Finnegan/S. Finnegan/P. Wagner] |